Class Keeper

11.04-rangeBasedForLoopWithTemporary0/main.cpp:8–16

#  include <vector>

class Keeper {  // #A
  std::vector<int> data{2, 3, 4};

public:
  ~Keeper() { std::cout << "dtor\n"; }

  // #B Returns by reference
  auto& items() { return data; }
};

Keeper GetKeeper()  // #C Returns by value
{